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You searched for: “Patterson, Robert; and perpetual-motion machine”
Results 1-3 of 3 sorted by date (ascending)
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1Robert Patterson to Thomas Jefferson, 30 November 1812 (Jefferson Papers)
Patterson, Robert; and perpetual-motion machine [index entry] 
2Thomas Jefferson to Robert Patterson, 27 December 1812 (Jefferson Papers)
Patterson, Robert; and perpetual-motion machine [index entry] 
3Robert Patterson to Thomas Jefferson, 12 January 1813 (Jefferson Papers)
Patterson, Robert; and perpetual-motion machine [index entry]